Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: btrfs: setpageextentmapped after readfolio in btrfscontexpand. While attempting to run the subpage block size tests, I encountered the following panic in generic/476: Assertion failed: PagePrivatepage && page-private, in...

CVE-2023-53247

CVE-2023-53247 involves the Linux kernel Btrfs code (btrfs_cont_expand path). The issue arises when a page is retrieved during btrfs_cont_expand, then marked as mapped and read; if release_folio() is called before reacquiring the page lock, release_folio() may clear the page private flag but leav...